EP0389148A1 - Druckbandkassette für Schreibmaschinen - Google Patents

Druckbandkassette für Schreibmaschinen Download PDF

Info

Publication number
EP0389148A1
EP0389148A1 EP90302498A EP90302498A EP0389148A1 EP 0389148 A1 EP0389148 A1 EP 0389148A1 EP 90302498 A EP90302498 A EP 90302498A EP 90302498 A EP90302498 A EP 90302498A EP 0389148 A1 EP0389148 A1 EP 0389148A1
Authority
EP
European Patent Office
Prior art keywords
ribbon
tube
supply spool
cassette
spring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP90302498A
Other languages
English (en)
French (fr)
Other versions
EP0389148B1 (de
Inventor
Claudio Gillio
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Telecom Italia SpA
Olivetti SpA
Original Assignee
Olivetti SpA
Ing C Olivetti and C SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Olivetti SpA, Ing C Olivetti and C SpA filed Critical Olivetti SpA
Publication of EP0389148A1 publication Critical patent/EP0389148A1/de
Application granted granted Critical
Publication of EP0389148B1 publication Critical patent/EP0389148B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J32/00—Ink-ribbon cartridges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J33/00—Apparatus or arrangements for feeding ink ribbons or like character-size impression-transfer material
    • B41J33/14—Ribbon-feed devices or mechanisms
    • B41J33/52—Braking devices therefor

Definitions

  • the present invention relates to a cassette for a printing ribbon for typewriters comprising a casing accommodating a supply spool on which the printing ribbon is wound, a receiving spool on to which the ribbon is re-wound after having been used, and a brake and take up device which operates on a tube of the supply spool and on the ribbon which is unwound from said supply spool.
  • EP - A 0 075 084 discloses a cassette of this type, in which the brake-take up device comprises an omega-shaped spring which is applied against the external surface of an extension portion of the tube of the supply spool.
  • the omega-shaped spring comprises two arms of which a first arm is fixed to the casing and the second has an L-shaped bent portion which is engaged to guide and tension the ribbon as it is unwound from the supply spool.
  • the tension of the spring holds the omega-shaped part bearing against the external surface of the tube and the supply spool is braked.
  • the tension of the ribbon causes the second arm of the spring to flex, thereby expanding the omega-shaped part thereof. The latter no longer bears against the external surface of the tube and the supply spool is free to rotate.
  • the second arm of the spring oscillates continuously, tensioning the ribbon which is unwound from the spool and alternating braking actions with release actions.
  • US - A 4 505 605 also discloses a cassette for a printing ribbon in which the brake-take up device comprises two springs.
  • a first spring has one end bent at an angle of 90° and introduced into a central hole in a supply spool.
  • the tension of the ribbon holds the external part of the ribbon which is wound on the supply spool constantly pressed against a wall of the container to apply friction to the ribbon and keep it at a predetermined tension.
  • a part of the wall has a series of projections or ribs projecting from the wall by variable amounts such as to compensate for the variations in tension of the spring due to the reduction in diameter of the supply spool.
  • the object of the present invention is therefore that of providing a cassette for a printing ribbon which is simple, reliable in use and of limited bulk and which makes it possible for the ribbon always to be correctly tensioned both in the rest position and in the operating position and which ensures printing of optimum quality.
  • a cassette for a printing ribbon is generally indicated by reference numeral 11 and comprises a casing 12 of plastics material, having a bottom 13, rear walls 14, 16, 17, 18 and 19, two right-hand side walls 21 and 22, a front wall 23 and two left-­hand side walls 24 and 26.
  • the casing 12 is closed upwardly by a cover 27 and comprises two arms 28 and 29 projecting from the rear walls 14 and 19, having two openings 31 and 32 which each permit a printing ribbon 33 to pass therethrough.
  • the casing 12 is capable of accommodating a supply spool generally indicated by reference numeral 34 and on to which the ribbon 33 is wound, and a receiving spool generally indicated by reference numeral 36, on to which the ribbon 33 is wound again after having been used.
  • the supply spool 34 is rotatable by means of a tube 37 on a sleeve 38 projecting from the bottom 13 of the casing 12.
  • a brake and take up device generally indicated by reference numeral 39 operates and co-operates with an internal surface 41 of the tube 37 and comprises a brake shoe 42 which is movable within the tube 37.
  • the brake shoe 42 is pivotally mounted on the sleeve 38 and rotates in both directions by means of a pin 43 (see Figures 2, 3, 4 and 5) which is positioned at one end and capable of being accommodated in a hole 44 in the sleeve 38.
  • the brake shoe 42 comprises coupling means 46 and an external surface 47 co-operable with the internal surface 41 of the tube 37.
  • the brake-take up device 39 comprises a spring 48 (see Figures 1, 2, 3, 4 and 5) of the wire type and having an L-shaped bent end 49 accommodated in a hole 50 in a feed support 51 of the casing 12.
  • a tongue portion 65 on the casing 12 is normally disposed over the end 49 of the spring 48 and prevents undesired vertical movements of the spring 48.
  • An intermediate portion 52 of the spring 48 is co-operable with a feed pin 53 projecting from the sleeve 38 and with the coupling means 46 to provide prestressing of the spring 48.
  • a terminal portion or take-up element 54 of the spring 48 has an L-shaped bent portion 55 against which the ribbon 33 is engaged and guided as it is unwound from the supply spool 34.
  • the sleeve 38 has an external surface 57 delimited by vertical ribs 58 of semi-cylindrical shape and capable of co-­operating over their full height with the internal surface 41 of the tube 37, being such as to reduce the contact surface area as between the sleeve 38 and the internal surface 41 of the tube 37 and to permit an easy sliding movement, even when there are wear particles between the components.
  • the ribs 58 are positioned only over one half of the circum­ference of the sleeve 38 and are disposed in opposite relationship to the brake shoe 42.
  • the sleeve 38 has a space delimited by a lowered edge 59, substantially halfway along the height of the tube 37.
  • the hole 44 is provided in the lowered zone and the shoe 42 extends like a flag from the edge 59 to the upper edge of the tube 37 and is supported movably on the edge 59.
  • the seat 56 of the fork element 46 holds the portion 52 in line with the upper edge of the tube 37.
  • the cover 27 also has a recess 60 to permit free movement of the fork element 46.
  • a wire spring 61 which is pivotally mounted by an intermediate portion thereof about a fixed pin 62 on the bottom 13 has one end 63 engaged against a fixed pin 64 on the bottom 13.
  • the other end 66 of the spring 61 has an L-shaped bent portion which is accommodated in a central hole 67 (see Figure 1) of a tube 68 of the receiving spool 66.
  • the tension of the spring 36 always holds the tube 68 in a displaced position in which it is pressed, with the ribbon 33 which is being wound on to the receiving spool 36 again, against the teeth of a drive wheel 69 for the unidirectional feed movement of the ribbon 33.
  • the wheel 69 is fixed and coaxial with a sawtooth wheel 71 (see Figures 1 and 6) which is positioned at a higher level with respect to the receiving spool 36 and which therefore does not interfere with the ribbon 33 when it is being wound on to the tube 68 again.
  • the sawtoothed wheel 71 cooperates with a resilient blade portion 72 mounted on a fixed support 73 of the casing 12 and capable of preventing rotary movement of the wheel 69 in the reverse direction and thus unwinding of the ribbon 33 from the spool 68.
  • the wheel 69 can be coupled to a drive shaft 74 of the machine, which rotates the wheel 69 for the unidirectional fixed movement of the ribbon 33.
  • the wheel 69 is also fixed with respect to a gripping portion 76 which projects from the cover 27 for manual fixed movement of the ribbon 33.
  • the casing 12 comprises a through slot or groove 77 (see Figures and 4) which is provided in the bottom 13 and which is capable of accommodating the lower end of the L-shaped bent portion 55 of the spring 48 to facilitate the movement of the bent portion and to prevent contact from occurring between the bent portion and the bottom 13.
  • the ribbon 33 is unwound from the supply spool 34, is engaged with the L-­shaped bent portion 55 and by way of the opening 31 issues from the casing 12 to pass back into the casing 12 again by way of the opening 32, is guided around a fixed pin 78 on the bottom 13 and is then re­wound on to the tube 68 of the receiving spool 36.
  • the toothed wheel 69 is rotated by the drive shaft 74, for example as described in our EP - A 0 333 375.
  • the tube 68 of the receiving spool 36 is driven in rotation by the toothed wheel 69 and causes unidirectional forward movement of the ribbon 33.
  • the tension of the ribbon 33 overcomes the tension of the spring 48 and causes the spring 48 to flex by means of the end 54 and the L-shaped bent portion 55.
  • the intermediate portion 52 of the spring 48 then entrains the brake shoe 42 in an anti-clockwise rotary movement and positions it in its second position in which the external surface47 of the shoe 42 is spaced from the internal surface 41 of the tube 37, as shown in Figure 3.
  • the supply spool 34 is free to rotate and the ribbon 33 is free to advance.
  • the spring 48 which also perforns the function of a take-up means to regulate the tensioning of the ribbon 33, with its end 54 and the L-­ shaped bent portion 55, will continuously oscillate between intermediate positions delimited by the solid line and the broken line, as shown in Figure 1, alternating braking actions with slackening actions in regard to the spool 39, while the ribbon 33 is always normally and uniformly tensioned.
  • the tension of the spring 48 gradually causes the brake shoe 42 to rotate in the clockwise direction, by means of the intermediate portion 52, to position it in the first position in which the external surface 47 of the shoe 42 is again engaged against the internal surface 41 of the tube 37 and the supply spool 34 is braked.
  • the spring 48 still continues with its take-up function and by means of the end 54 and the L-shaped bent portion 55 holds the ribbon 33 in a constantly tensioned condition, being resisted by the reverse action applied by the blade portion 72 to the sawtoothed wheel 71.
  • the cassette 11 for the ribbon 33 may be the subject of modifications and improvements both in regard to the shape and the arrangement of the various components and elements without departing from the scope of the present invention.
  • the external surface 47 of the brake shoe 42 may be substantially smooth to co-operate with the smooth internal surface 41 of the tube 37, as described hereinbefore, or it may be knurled to co-­operate with the smooth or knurled internal surface 41 of the tube 37.
  • it may be provided with a tooth capable of mashing with an internal tooth arrangement provided on the internal surface 41 of the tube 37.
  • the brake shoe 42 may be supported by parts of the cover 27 of the casing 12 which are independent of the sleeve 38 on which the tube 37 of the supply spool 34 is rotatably mounted.
  • the brake shoe 42 may be coupled to the take-up element by means of intermediate cam or lever elements to modify the braking action of the shoe 42 on the tube 37 with respect to the accumulation and tensioning effect applied by the spring 48 to the ribbon 33 as it is unwound from the supply spool 34.
  • the shoe 42 may involve a linear movement which is produced by means of sliding couplings rather than rotational couplings.

Landscapes

  • Impression-Transfer Materials And Handling Thereof (AREA)
  • Pens And Brushes (AREA)
  • Nitrogen And Oxygen Or Sulfur-Condensed Heterocyclic Ring Systems (AREA)
  • Automatic Tape Cassette Changers (AREA)
EP90302498A 1989-03-20 1990-03-08 Druckbandkassette für Schreibmaschinen Expired - Lifetime EP0389148B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT6719089 1989-03-20
IT8967190A IT1231883B (it) 1989-03-20 1989-03-20 Cartuccia per un nastro di scrittura di macchine scriventi

Publications (2)

Publication Number Publication Date
EP0389148A1 true EP0389148A1 (de) 1990-09-26
EP0389148B1 EP0389148B1 (de) 1994-12-21

Family

ID=11300346

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90302498A Expired - Lifetime EP0389148B1 (de) 1989-03-20 1990-03-08 Druckbandkassette für Schreibmaschinen

Country Status (10)

Country Link
US (1) US5085531A (de)
EP (1) EP0389148B1 (de)
JP (1) JPH03114769A (de)
AT (1) ATE115915T1 (de)
AU (1) AU626647B2 (de)
BR (1) BR9001293A (de)
CA (1) CA2012545C (de)
DE (1) DE69015234T2 (de)
ES (1) ES2066123T3 (de)
IT (1) IT1231883B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5873662A (en) * 1997-12-03 1999-02-23 Illinois Tool Works Inc. Printer with dancer arm and reel brake and method therefor

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0471878A (ja) * 1990-07-13 1992-03-06 Canon Inc インクシートカートリッジ及び前記インクシートカートリッジを用いる記録装置
US5383733A (en) * 1992-07-24 1995-01-24 Summagraphics Corporation Ribbon cassette for a printer
US5474393A (en) * 1993-09-16 1995-12-12 Maverick International, Inc. Compact remote-driven encoder
DE69426516T2 (de) * 1993-10-15 2001-05-17 Monarch Marking Systems, Inc. Drucker
FR2725707A1 (fr) * 1994-10-14 1996-04-19 Ier Cassette et rouleau pour ruban consommable, appareil recepteur, et procede de couplage en rotation du rouleau
TW403053U (en) * 1995-09-12 2000-08-21 Seiko Epson Corp Color tape cartridge device of electronic machine
JP3700692B2 (ja) * 2002-09-27 2005-09-28 ブラザー工業株式会社 リボンカセット

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4350454A (en) * 1980-08-11 1982-09-21 Ibm Patent Operations Ribbon cartridge including hub brake
EP0189168A2 (de) * 1985-01-23 1986-07-30 Ryford Limited Bandkassetten
CH668942A5 (en) * 1986-02-06 1989-02-15 Buettner Ag Franz Typewriter ink ribbon cassette with brake on supply reel - has cantilever spring exerting pressure on core of reel for engagement of radial tooth on axis

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4449837A (en) * 1981-09-25 1984-05-22 Craft James A Ribbon cartridge with back check
US4401394A (en) * 1981-10-13 1983-08-30 Xerox Corporation Universal end of ribbon sensing system
JPS5999759U (ja) * 1982-11-20 1984-07-05 ブラザー工業株式会社 リボンカセツト
JPS6131278A (ja) * 1984-07-25 1986-02-13 Hitachi Ltd リボンカセツトのたるみ防止機構

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4350454A (en) * 1980-08-11 1982-09-21 Ibm Patent Operations Ribbon cartridge including hub brake
EP0189168A2 (de) * 1985-01-23 1986-07-30 Ryford Limited Bandkassetten
CH668942A5 (en) * 1986-02-06 1989-02-15 Buettner Ag Franz Typewriter ink ribbon cassette with brake on supply reel - has cantilever spring exerting pressure on core of reel for engagement of radial tooth on axis

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5873662A (en) * 1997-12-03 1999-02-23 Illinois Tool Works Inc. Printer with dancer arm and reel brake and method therefor

Also Published As

Publication number Publication date
IT8967190A0 (it) 1989-03-20
DE69015234T2 (de) 1995-05-04
CA2012545C (en) 1999-03-23
US5085531A (en) 1992-02-04
AU626647B2 (en) 1992-08-06
AU5125790A (en) 1990-09-20
BR9001293A (pt) 1991-03-26
ES2066123T3 (es) 1995-03-01
IT1231883B (it) 1992-01-14
DE69015234D1 (de) 1995-02-02
CA2012545A1 (en) 1990-09-20
EP0389148B1 (de) 1994-12-21
ATE115915T1 (de) 1995-01-15
JPH03114769A (ja) 1991-05-15

Similar Documents

Publication Publication Date Title
US4350454A (en) Ribbon cartridge including hub brake
US4288048A (en) Cassette
US4337001A (en) Releasable ribbon locking device in a ribbon cartridge
EP0377256B1 (de) Farbbandkassette für Drucker
JPS6366674B2 (de)
EP0389148A1 (de) Druckbandkassette für Schreibmaschinen
JPS60176791A (ja) レタリング装置にテ−プおよびリボンを供給するためのカ−トリツジ
US4605327A (en) Print ribbon cassette including ribbon tensioning means
JPS6023987B2 (ja) タイプライタ−用リボンカセツト
NO154120B (no) Antireverseringsanordning for en b¨ndspoler.
US5044794A (en) Ink ribbon cassette
JP4566431B2 (ja) 塗布膜転写具
US5163764A (en) Cartridge for a typing ribbon having a ribbon tensioner
JPH0224186A (ja) タイプライターの修正リボン用カートリッジ
EP0882395A1 (de) Durch Angelleinesensor geregelte Bremsmechanismus für Angelwinden
US7430973B2 (en) Thread tension mechanism and sewing machine
US6676067B2 (en) Anti-loop reel-holder flange in a dispensing machine for wipe material
JP2004141144A (ja) スピニングリールのロータ制動装置
US5192149A (en) Cassette for typing ribbon for typewriters
JP2007185159A (ja) 魚釣用リール
JP2585981B2 (ja) 繊維機械のための糸張力付与方法及びその装置
JPH0568999U (ja) 記録紙搬送装置
JPS6054214B2 (ja) テ−プ等の送り装置
JPH043821Y2 (de)
JPS63115776A (ja) リボン送り装置

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE ES FR GB LI NL

17P Request for examination filed

Effective date: 19901220

17Q First examination report despatched

Effective date: 19920824

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE ES FR GB LI NL

REF Corresponds to:

Ref document number: 115915

Country of ref document: AT

Date of ref document: 19950115

Kind code of ref document: T

REF Corresponds to:

Ref document number: 69015234

Country of ref document: DE

Date of ref document: 19950202

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2066123

Country of ref document: ES

Kind code of ref document: T3

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20090326

Year of fee payment: 20

Ref country code: AT

Payment date: 20090219

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20090324

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20090325

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20090327

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 20090430

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20090317

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20090403

Year of fee payment: 20

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: NL

Ref legal event code: V4

Effective date: 20100308

BE20 Be: patent expired

Owner name: C. *OLIVETTI & C. S.P.A.

Effective date: 20100308

REG Reference to a national code

Ref country code: GB

Ref legal event code: PE20

Expiry date: 20100307

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20100309

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20100307

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20100308

Ref country code: ES

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20100309

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20100308